Multiple security issues have been found in the tiff image librarythat may allow remote attackers to cause a denial of service(application crash), to obtain sensitive information from processmemory or possibly have unspecified other impact via a crafted image

For Debian 7 "Wheezy", these problems have been fixed in version4.0.2-6+deb7u12.

We recommend that you upgrade your tiff packages.

Further information about Debian LTS security advisories, how to applythese updates to your system and frequently asked questions can befound at: https://wiki.debian.org/LTS